4:43O you who believe! Do not approach the prayer while you are drunk, so that you know what you say; nor after sexual orgasm—unless you are travelling—until you have bathed. If you are sick, or traveling, or one of you comes from the toilet, or you have had intercourse with women, and cannot find water, find clean sand and wipe your faces and your hands with it. God is Pardoning and Forgiving.

4:77Have you not considered those who were told, “Restrain your hands, and perform your prayers, and spend in regular charity”? But when fighting was ordained for them, a faction of them feared the people as God is ought to be feared, or even more. And they said, “Our Lord, why did You ordain fighting for us? If only You would postpone it for us for a short while.” Say, “The enjoyments of this life are brief, but the Hereafter is better for the righteous, and you will not be wronged one bit.”

4:101When you travel in the land, there is no blame on you for shortening the prayers, if you fear that the disbelievers may harm you. The disbelievers are your manifest enemies.

4:102When you are among them, and you stand to lead them in prayer, let a group of them stand with you, and let them hold their weapons. Then, when they have done their prostrations, let them withdraw to the rear, and let another group, that have not prayed yet, come forward and pray with you; and let them take their precautions and their weapons. Those who disbelieve would like you to neglect your weapons and your equipment, so they can attack you in a single assault. You commit no error, if you are hampered by rain or are sick, by putting down your weapons; but take precautions. Indeed, God has prepared for the disbelievers a demeaning punishment.

4:103When you have completed the prayer, remember God, standing, or sitting, or on your sides. And when you feel secure, perform the prayer. The prayer is obligatory for believers at specific times.

4:142The hypocrites try to deceive God, but He is deceiving them. And when they stand for prayer, they stand lazily, showing off in front of people, and remembering God only a little.

4:162But those among them firmly rooted in knowledge, and the believers, believe in what was revealed to you, and in what was revealed before you; and the observers of prayers, and the givers of charity, and the believers in God and the Last Day—upon these We will bestow an immense reward.